Webster's Revised Unabridged Dictionary · 1913

Solid

Solid (sol"id) , adjective

[Latin solidus, probably akin to sollus whole, entire, Greek {not transcribed}: compare French solide. Compare Consolidate,Soda, Solder, Soldier, Solemn.]

1.
Having the constituent parts so compact, or so firmly adhering, as to resist the impression or penetration of other bodies; having a fixed form; hard; firm; compact; -- opposed to fluid and liquid or to plastic, like clay, or to incompact, like sand.
2.
Not hollow; full of matter; as, a solid globe or cone, as distinguished from a hollow one; not spongy; dense; hence, sometimes, heavy.
3.
(Arithmetic) Having all the geometrical dimensions; cubic; as, a solid foot contains 1,728 solid inches.

In this sense, cubics now generally used.

4.
Firm; compact; strong; stable; unyielding; as, a solid pier; a solid pile; a solid wall.
5.
Applied to a compound word whose parts are closely united and form an unbroken word; -- opposed to hyphened.
6.
Figuratively: Worthy of credit, trust, or esteem; substantial, as opposed to frivolous or fallacious; weighty; firm; strong; valid; just; genuine.
The solid purpose of a sincere and virtuous answer. — Milton
These, wanting wit, affect gravity, and go by the name of solid men. — Dryden
The genius of the Italians wrought by solid toil what the myth-making imagination of the Germans had projected in a poem. — J. A. Symonds
7.
Sound; not weakly; as, a solid constitution of body. — I. Watts
8.
(Botany) Of a fleshy, uniform, undivided substance, as a bulb or root; not spongy or hollow within, as a stem.
9.
(Metaphysics) Impenetrable; resisting or excluding any other material particle or atom from any given portion of space; -- applied to the supposed ultimate particles of matter.
10.
(Printing) Not having the lines separated by leads; not open.
11.
United; without division; unanimous; as, the delegation is solid for a candidate. [Polit. Cant. United States]
Repose you there; while I [return] to this hard house, More harder than the stones whereof 't is raised. — Shakespeare
I hear his thundering voice resound, And trampling feet than shake the solid ground. — Dryden
Collocations (7)
Solid angle (Geometry) , See under Angle.
Solid color , an even color; one not shaded or variegated.
Solid green , See Emerald green (a), under Green.
Solid measure (Arithmetic) , a measure for volumes, in which the units are each a cube of fixed linear magnitude, as a cubic foot, yard, or the like; thus, a foot, in solid measure, or a solid foot, contains 1,728 solid inches.
Solid newel (Architecture) , a newel into which the ends of winding stairs are built, in distinction from a hollow newel. See under Hollow, a.
Solid problem (Geometry) , a problem which can be construed geometrically, only by the intersection of a circle and a conic section or of two conic sections. — Hutton
Solid square (Military) , a square body or troops in which the ranks and files are equal.

Solid , noun

1.
A substance that is held in a fixed form by cohesion among its particles; a substance not fluid.
2.
(Geometry) A magnitude which has length, breadth, and thickness; a part of space bounded on all sides.
Collocations (1)
Solid of revolution (Geometry) , See Revolution, n., 5.